Are all micro SD cards created equal?

All SD cards are created equal – but some are more equal than others.¹ There's quality for one (as wbogacz stated: "You get what you pay for" – you cannot expect a high-quality long-life product for free). Another criterion are the "classes" – and not only for speed, but also for energy consumption. As higher classes are faster, your battery will last longer for they eat less juice.

With cheap no-name cards you might draw a lucky one, but no guarantees for that. With brand names you get warranty: less risk of short live, and replacements when broken.

My recommendations for use with Android devices:

• do not go below class 6 (too slow and too battery-hungry)


• use a known brand with good reputation


• better pay a buck more than to be sorry later


• if money is an issue, better stick with a smaller good card than a cheap big one

^{1: freely adapted after Orwell's Animal Farm}